Volcano Hazards

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There are 169 potentially active volcanoes in the U.S. The mission of the USGS Volcano Hazards Program is to enhance public safety and minimize social and economic disruption from volcanic unrest and eruption. We accomplish this by delivering effective forecasts, warnings, and information about volcano hazards based on scientific understanding of volcanic processes.

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As many people have noted, the last global pandemic was raging one hundred years ago. Kīlauea was erupting 100 years ago, although it was certainly not quite as significant of an event on the world stage. This eruption a century ago produced the Mauna Iki (“little mountain”) lava shield on Kīlauea’s Southwest Rift Zone.

Yellowstone Volcano remains at GREEN/NORMAL. Yellowstone National Park is open and seasonal field work began last month. The University of Utah Seismograph Stations located 288 earthquakes in May that occurred as part of three swarms. Ground deformation remains unchanged from last month.